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Data Security and Access Control is an exigent work in the environment of Cloud Computing. The users upload the personal and classified data over the cloud. Security is mandatory for such type of outsourced data, so that users are confident while processing their private and confidential data. Modern technology suffers from computational problem of keys and there exchange. This paper emphasizes the different problems and issues that arise while using cloud services such as key generation, data security and authentication. The paper addresses these problems using access control technique which ensures that only the valid users can access their data.
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